github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/ctl/master/show_ddl_locks.go (about)

     1  // Copyright 2019 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package master
    15  
    16  import (
    17  	"context"
    18  	"errors"
    19  	"os"
    20  
    21  	"github.com/pingcap/tiflow/dm/ctl/common"
    22  	"github.com/pingcap/tiflow/dm/pb"
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  // NewShowDDLLocksCmd creates a ShowDDlLocks command.
    27  func NewShowDDLLocksCmd() *cobra.Command {
    28  	cmd := &cobra.Command{
    29  		Use:    "show-ddl-locks [-s source ...] [task-name | task-file]",
    30  		Short:  "Shows un-resolved DDL locks",
    31  		Hidden: true,
    32  		RunE:   showDDLLocksFunc,
    33  	}
    34  	return cmd
    35  }
    36  
    37  // showDDLLocksFunc does show DDL locks.
    38  func showDDLLocksFunc(cmd *cobra.Command, _ []string) error {
    39  	if len(cmd.Flags().Args()) > 1 {
    40  		cmd.SetOut(os.Stdout)
    41  		common.PrintCmdUsage(cmd)
    42  		return errors.New("please check output to see error")
    43  	}
    44  	taskName := common.GetTaskNameFromArgOrFile(cmd.Flags().Arg(0)) // maybe empty
    45  
    46  	sources, err := common.GetSourceArgs(cmd)
    47  	if err != nil {
    48  		return err
    49  	}
    50  
    51  	ctx, cancel := context.WithCancel(context.Background())
    52  	defer cancel()
    53  
    54  	resp := &pb.ShowDDLLocksResponse{}
    55  	err = common.SendRequest(
    56  		ctx,
    57  		"ShowDDLLocks",
    58  		&pb.ShowDDLLocksRequest{
    59  			Task:    taskName,
    60  			Sources: sources,
    61  		},
    62  		&resp,
    63  	)
    64  
    65  	if err != nil {
    66  		common.PrintLinesf("can not show DDL locks for task %s and sources %v", taskName, sources)
    67  		return err
    68  	}
    69  
    70  	common.PrettyPrintResponse(resp)
    71  	return nil
    72  }